AMBULATORY DISPERSAL BEHAVIOR OF NEOSEIULUS-FALLACIS (ACARINA, PHYTOSEIIDAE) IN RELATION TO PREY DENSITY AND TEMPERATURE

被引：20

作者：

BERRY, JS

HOLTZER, TO

机构：

[1] Department of Entomology, University of Nebraska-Lincoln, Lincoln, 68583-0816, NE

来源：

EXPERIMENTAL & APPLIED ACAROLOGY | 1990年 / 8卷 / 04期

关键词：

D O I：

10.1007/BF01202136

中图分类号：

Q96 [昆虫学];

学科分类号：

摘要：

Ambulatory dispersal behavior of Neoseiulus fallacis (Garman) was studied in the laboratory to evaluate within-plant movement in relation to temperature and prey density. Adult female N. fallacis were confined in 2.5-cm-diameter arenas on the abaxial surface of excised corn leaves. Four temperatures (23, 28, 33, and 39° C) and prey densities ranging from 0 to 55 spider mite eggs per cm2 were used. The walking paths of these mites were traced, digitized and used to calculate turning angles, walking speeds and turning rates. A computer simulation of walking behavior used this information to model mite ambulatory behavior and predict dispersal rates. Neoseiulus fallacis behavior while on whole corn leaves was quantified to verify the results of the simulation. The results showed that N. fallacis will follow a leaf or arena edge (edge-walking) at all temperatures and prey densities. In addition, this behavior was used to the exclusion of the other types of behavior such as resting, and random-walk type search when prey egg density was less than 4 eggs per cm2. The exclusion of edge-walking behavior from the model caused the model to underestimate substantially the dispersal rates leaves. These data suggest that there are at least two recognizable types of ambulatory search used by N. fallacis-the random-walk type, which is used when prey density is high (searching within prey patches), and the edge-walking behavior, which is used when prey density is low. This behavior allows the mite to travel rapidly from leaf to leaf in search of new prey patches. © 1990 Elsevier Science Publishers B.V.

引用

页码：253 / 274

页数：22

共 33 条

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